/*
 * Copyright (C) 2005-2011 MaNGOS <http://www.getmangos.com/>
 *
 * Copyright (C) 2008-2011 Trinity <http://www.trinitycore.org/>
 *
 * Copyright (C) 2010-2011 ProjectSkyfire <http://www.projectskyfire.org/>
 * 
 * Copyright (C) 2011 ArkCORE <http://www.arkania.net/>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

#include <ace/Singleton.h>
#include <ace/Thread_Mutex.h>
#include <ace/Log_Msg.h>

#include "DelayExecutor.h"

DelayExecutor* DelayExecutor::instance() {
	return ACE_Singleton<DelayExecutor, ACE_Thread_Mutex>::instance();
}

DelayExecutor::DelayExecutor() :
		pre_svc_hook_(0), post_svc_hook_(0), activated_(false) {
}

DelayExecutor::~DelayExecutor() {
	if (pre_svc_hook_)
		delete pre_svc_hook_;

	if (post_svc_hook_)
		delete post_svc_hook_;

	deactivate();
}

int DelayExecutor::deactivate() {
	if (!activated())
		return -1;

	activated(false);
	queue_.queue()->deactivate();
	wait();

	return 0;
}

int DelayExecutor::svc() {
	if (pre_svc_hook_)
		pre_svc_hook_->call();

	for (;;) {
		ACE_Method_Request* rq = queue_.dequeue();

		if (!rq)
			break;

		rq->call();
		delete rq;
	}

	if (post_svc_hook_)
		post_svc_hook_->call();

	return 0;
}

int DelayExecutor::activate(int num_threads, ACE_Method_Request* pre_svc_hook,
		ACE_Method_Request* post_svc_hook) {
	if (activated())
		return -1;

	if (num_threads < 1)
		return -1;

	if (pre_svc_hook_)
		delete pre_svc_hook_;

	if (post_svc_hook_)
		delete post_svc_hook_;

	pre_svc_hook_ = pre_svc_hook;
	post_svc_hook_ = post_svc_hook;

	queue_.queue()->activate();

	if (ACE_Task_Base::activate(THR_NEW_LWP | THR_JOINABLE | THR_INHERIT_SCHED,
			num_threads) == -1)
		return -1;

	activated(true);

	return true;
}

int DelayExecutor::execute(ACE_Method_Request* new_req) {
	if (new_req == NULL)
		return -1;

	if (queue_.enqueue(new_req, (ACE_Time_Value*) &ACE_Time_Value::zero)
			== -1) {
		delete new_req;
		ACE_ERROR_RETURN(
				(LM_ERROR, ACE_TEXT("(%t) %p\n"), ACE_TEXT("DelayExecutor::execute enqueue")),
				-1);
	}

	return 0;
}

bool DelayExecutor::activated() {
	return activated_;
}

void DelayExecutor::activated(bool s) {
	activated_ = s;
}
